Valve-gear for steam-engines



(No Model.) 2 Sheets-Shet 1.

J. BRAUNWALDER. w VALVE GEAR POR STEAM ENGINES.

No. 286,585. Patented Oct. 16, 1883.

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2 Sheets-Sheet 2.

(No Model.) A v J. BRAUNWALDER.

VALVE GEAR EUR STEAM ENGINES. No. 286,585. Patented Oct. 16, 1883.v

N. PETERS. mowtnhagnpher. vlnhingmn. B, c.

JACOB BRAUNVALDER, OF MILVAUKElh VISCONSIN.

VALVE-GEAR FOR sTEAMeNesNEs.

fo all whom t may concern:

Be it known that-I, JACOB BRAUNWALDER, a citizen of the UnitedStates, residing at Milwaukee, in the county of Milwaukee and State of Visconsin, have inventedcertain new and useful Improvements iu/Talve-Gears for Steam- Engines; and Ido hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled io in the-art to which it appertains to make and ,use the same, reference being had to the accompanying drawings, and to'letters or figures off reference marked thereon, which form a part of this specification.

My invention relates to improvements in steam-engines, and pertains to the devices by which motion is transmitted from the governor to the cut-oli valves. whereby said valves are automaticallyadj usted to admit steam during zo the whole or any fractional partei' the stroke of the piston, as the work of the engine may require. Y

My improvements-are further explained by reference to they accompanying drawings, in which Figure l represents a side elevation of my invention, and Fig. 2 a'horizontal section of the cylinder' and steam-chest with which my valve-gears are adapted to be operated.

\ Fig. 3 is an end view of the device shown in 3o Fig. 1, and Fig. 4 a det-ail in section.

Like parts are represented by the saine reference-letters throughout the several views.

4o beveled gears G G, crank-pin H, and rod I.

A represents the shaft of the ily-wheel, from which motion is communicated to the gov-l ernor in the ordinary manner by banda, pulley b, shaft c, and beveled gears dd. A continuous uniform reciprocating movement is communicated from said shaft Ato the cut-off valve B through beveled gears E E, shaft F,

5o valves L and B are continuously changing as SPECIFICATION forming part of Letters Patent No. 286,585, dated Cctobcr 16, 1883,

Application ilcd April D, 1883. (No inodeh,

the speed of the engine changes, communicated to valve L from shaft F through rod M, crank-pin N, endless-screw gear O, and endless-screw gear I. lVhen gears O and P maintain the same relative'position to each other shown, the valve-rods I and M will also maintain the same relative position to each other and the piston; but such relations of the valves are changed by the forward or backward action of the gear lD as said gear l? moves forward or toward the cylinder J. The. crank-` pin N is moved downward or back in its rotary' motion, thereby bringing the valve L back relatively to valve B, whereby said valves will be caused to move nearly together. Vlf'hen said gear'P moves rearward, the crankpin N is moved forward in its rotary movement, whereby said valves will be caused to reciprocate in opposite directions, thus causing the ports in the valves to quickly pass each other and cut off the steam when the piston is at the center of the stroke, whereby the steam works expansively. Thus the strokes of the valve are continuously varied as the gear P moves toward the right or left. The forward or rearward motion of said gear l? is caused as follows: Vhen the arms Q Q, move upward and downward, they, acting through armsR R,"

raised the lever A is released, when the spiral' spring B throws the sleeve C. toward the right, whencpin H passes through the revolving disk I and into a recess in the side, of pinion D.

Thus sleeve C', disk I', and pinion D are all coupled together, and motion is communi-' cated from said disk I through said coupling-sleeveA O to said y,pinion D', and from said pinion D' to pinion F. The pinion F is connected to the screw-shaft G', and causes it to revolve toward the left. In like manner, when arm V is raised, lever A is released, and the spring B, acting against the sleeve C, moves said sleeve outward, when the couplingpin H passes through ai hole in the revolving disk I and engages in a recess in pinion E', whereby motion is communicated from said revolving disk I to said pinion. From pinion E motion is communicated to said screw- Motion is Y IOO e eases shaft G by pinion F.' As either one of the arms V or W is raised the other is simultaneously lowered, when said arms, acting through the lever against which they are brought in contact, uncouples one of said sleeves as the other is coupled. Motion is communicated from shaft F continuously to said disks I and 1 I through bands Kdand L and pulleys M M. The band L is crossed, so that pulleys M M are revolved in opposite directions, whereby it is obvious that said screw-shaft is adapted to be revolved in either direction forward or backward, according to the position of the arms of the governor. When said arms are thrown upward, said screw is revolved toward the right. Vhen said arms drop, said screw is revolved in the opposite direction. The

screw-gear P is connected with said screw Gv by the bracket O, which bracket is provided with screw-sleeves P P. screw revolves toward the right said bracket O and screw-cylinder P is moved forward toward the cylinder J, and when the screw revolves in the opposite direction said screwgear or cylinder moves back or in the opposite direction, whereby it is obvious that the l relative position of the ports in the cnt-off valves are being continuously changed by the `rise and fall of the arms of the governor, and the steam vis permitted to follow the piston its entire stroke, or is cut oft' and allowed to act expansively at any intermediate point in the stroke ofthe piston, as the work of the engine may require.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the respective valve-rods I and M, of the cylindrical gears O and P, as arranged at right angles` to each other, and adapted by the forward and rearward movement of gear P upongear O to -change the relative positionof the valves,

Thus when said -whereby the steam is admitted to the cylinder during the whole or any fractional part of the stroke of the piston, said gears being connected with said valve-rods and the governor by the intermediate mechanism, substantially as described. l

2. The combination of valve B, as connected with the operative mechanism of the engine,

l having uniform rotary movement, valve L, and

the motion of said screw, whereby said gear P is caused to move longitudinally backward and forward on said gear O as they revolve, substantially as set forth.

3. The mechanism for transmitting motion from the governor to the regulatingvalve of an engine, consisting in the combination of collar S, bar T, arm U, arms V and XV, levers AA, coupling-collars C C, gears EF F F, screwG, bracket O, screws O and P, rod M, springs B B, shaft F, bands K L, pulleys M M, coupling-flanges I and I, and coupling-pins H, said shaft F being adapted to communicate a rotary motion to the spiral gear P, while said screw G communicatesa longitudinal reciprocating motion thereto, said screw being reversed in its rotary movement by the joint action of the governor and operative mechanism of the engine, all substantially as and for the purpose specified.

In testimony whereof I affix my signature in presence of two witnesses. l

JACOB BRAUNWALDER.

iVitnesses:

W. J. SINNOTT, J As. B. ERwIN. 

